mirror of
https://code.videolan.org/videolan/vlc
synced 2024-09-04 09:11:33 +02:00
![Laurent Aimar](/assets/img/avatar_default.png)
Made demux2_IsPathExtension case insensitive. Used demux2_IsPathExtension/p_demux->b_force when appropriate Fixed a regression in flac demuxer (segfault when reading meta data) Added a VLC_UNUSED(x) macro to avoid seeing ugly (void)x around the code. Improved a bit a few vlc_common.h macro (do {} while(0))
333 lines
12 KiB
C
333 lines
12 KiB
C
/*****************************************************************************
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* au.c : au file input module for vlc
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*****************************************************************************
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* Copyright (C) 2001-2007 the VideoLAN team
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* $Id$
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*
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* Authors: Laurent Aimar <fenrir@via.ecp.fr>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301, USA.
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*****************************************************************************/
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/*****************************************************************************
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* Preamble
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*****************************************************************************/
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#include <vlc/vlc.h>
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#include <vlc_demux.h>
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/* TODO:
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* - all adpcm things (I _NEED_ samples)
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* - ...
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*/
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/*****************************************************************************
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* Module descriptor
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*****************************************************************************/
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static int Open ( vlc_object_t * );
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static void Close( vlc_object_t * );
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vlc_module_begin();
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set_category( CAT_INPUT );
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set_subcategory( SUBCAT_INPUT_DEMUX );
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set_description( _("AU demuxer") );
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set_capability( "demux2", 10 );
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set_callbacks( Open, Close );
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add_shortcut( "au" );
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vlc_module_end();
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/*****************************************************************************
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* Local prototypes
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*****************************************************************************/
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enum AuType_e
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{
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AU_UNKNOWN = 0,
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AU_MULAW_8 = 1, /* 8-bit ISDN u-law */
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AU_LINEAR_8 = 2, /* 8-bit linear PCM */
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AU_LINEAR_16 = 3, /* 16-bit linear PCM */
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AU_LINEAR_24 = 4, /* 24-bit linear PCM */
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AU_LINEAR_32 = 5, /* 32-bit linear PCM */
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AU_FLOAT = 6, /* 32-bit IEEE floating point */
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AU_DOUBLE = 7, /* 64-bit IEEE floating point */
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AU_ADPCM_G721 = 23, /* 4-bit CCITT g.721 ADPCM */
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AU_ADPCM_G722 = 24, /* CCITT g.722 ADPCM */
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AU_ADPCM_G723_3 = 25, /* CCITT g.723 3-bit ADPCM */
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AU_ADPCM_G723_5 = 26, /* CCITT g.723 5-bit ADPCM */
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AU_ALAW_8 = 27 /* 8-bit ISDN A-law */
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};
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enum AuCat_e
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{
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AU_CAT_UNKNOWN = 0,
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AU_CAT_PCM = 1,
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AU_CAT_ADPCM = 2
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};
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struct demux_sys_t
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{
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es_format_t fmt;
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es_out_id_t *es;
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mtime_t i_time;
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int i_frame_size;
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mtime_t i_frame_length;
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int i_header_size;
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};
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static int Demux( demux_t * );
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static int Control ( demux_t *, int i_query, va_list args );
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/*****************************************************************************
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* Open: check file and initializes structures
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*****************************************************************************/
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static int Open( vlc_object_t *p_this )
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{
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demux_t *p_demux = (demux_t*)p_this;
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demux_sys_t *p_sys;
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uint8_t hdr[20];
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const uint8_t *p_peek;
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int i_cat;
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int i_samples, i_modulo;
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CHECK_PEEK( p_peek, 4 );
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if( memcmp( p_peek, ".snd", 4 ) )
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{
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return VLC_EGENERIC;
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}
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/* skip signature */
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stream_Read( p_demux->s, NULL, 4 ); /* cannot fail */
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/* read header */
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if( stream_Read( p_demux->s, hdr, 20 ) < 20 )
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{
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msg_Err( p_demux, "cannot read" );
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return VLC_EGENERIC;
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}
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if( GetDWBE( &hdr[0] ) < 24 )
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{
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msg_Err( p_demux, "invalid file" );
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return VLC_EGENERIC;
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}
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DEMUX_INIT_COMMON(); p_sys = p_demux->p_sys;
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p_sys->i_time = 1;
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p_sys->i_header_size = GetDWBE( &hdr[0] );
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/* skip extra header data */
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if( p_sys->i_header_size > 24 )
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{
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stream_Read( p_demux->s, NULL, p_sys->i_header_size - 24 );
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}
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/* init fmt */
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es_format_Init( &p_sys->fmt, AUDIO_ES, 0 );
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p_sys->fmt.audio.i_rate = GetDWBE( &hdr[12] );
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p_sys->fmt.audio.i_channels = GetDWBE( &hdr[16] );
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#if 0
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p_sys->au.i_header_size = GetDWBE( &p_sys->au.i_header_size );
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p_sys->au.i_data_size = GetDWBE( &p_sys->au.i_data_size );
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p_sys->au.i_encoding = GetDWBE( &p_sys->au.i_encoding );
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p_sys->au.i_sample_rate = GetDWBE( &p_sys->au.i_sample_rate );
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p_sys->au.i_channels = GetDWBE( &p_sys->au.i_channels );
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#endif
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switch( GetDWBE( &hdr[8] ) )
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{
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case AU_ALAW_8: /* 8-bit ISDN A-law */
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p_sys->fmt.i_codec = VLC_FOURCC( 'a','l','a','w' );
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p_sys->fmt.audio.i_bitspersample = 8;
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p_sys->fmt.audio.i_blockalign = 1 * p_sys->fmt.audio.i_channels;
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i_cat = AU_CAT_PCM;
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break;
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case AU_MULAW_8: /* 8-bit ISDN u-law */
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p_sys->fmt.i_codec = VLC_FOURCC( 'u','l','a','w' );
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p_sys->fmt.audio.i_bitspersample = 8;
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p_sys->fmt.audio.i_blockalign = 1 * p_sys->fmt.audio.i_channels;
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i_cat = AU_CAT_PCM;
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break;
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case AU_LINEAR_8: /* 8-bit linear PCM */
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p_sys->fmt.i_codec = VLC_FOURCC( 't','w','o','s' );
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p_sys->fmt.audio.i_bitspersample = 8;
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p_sys->fmt.audio.i_blockalign = 1 * p_sys->fmt.audio.i_channels;
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i_cat = AU_CAT_PCM;
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break;
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case AU_LINEAR_16: /* 16-bit linear PCM */
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p_sys->fmt.i_codec = VLC_FOURCC( 't','w','o','s' );
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p_sys->fmt.audio.i_bitspersample = 16;
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p_sys->fmt.audio.i_blockalign = 2 * p_sys->fmt.audio.i_channels;
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i_cat = AU_CAT_PCM;
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break;
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case AU_LINEAR_24: /* 24-bit linear PCM */
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p_sys->fmt.i_codec = VLC_FOURCC( 't','w','o','s' );
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p_sys->fmt.audio.i_bitspersample = 24;
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p_sys->fmt.audio.i_blockalign = 3 * p_sys->fmt.audio.i_channels;
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i_cat = AU_CAT_PCM;
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break;
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case AU_LINEAR_32: /* 32-bit linear PCM */
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p_sys->fmt.i_codec = VLC_FOURCC( 't','w','o','s' );
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p_sys->fmt.audio.i_bitspersample = 32;
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p_sys->fmt.audio.i_blockalign = 4 * p_sys->fmt.audio.i_channels;
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i_cat = AU_CAT_PCM;
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break;
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case AU_FLOAT: /* 32-bit IEEE floating point */
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p_sys->fmt.i_codec = VLC_FOURCC( 'a', 'u', 0, AU_FLOAT );
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p_sys->fmt.audio.i_bitspersample = 32;
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p_sys->fmt.audio.i_blockalign = 4 * p_sys->fmt.audio.i_channels;
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i_cat = AU_CAT_PCM;
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break;
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case AU_DOUBLE: /* 64-bit IEEE floating point */
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p_sys->fmt.i_codec = VLC_FOURCC( 'a', 'u', 0, AU_DOUBLE );
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p_sys->fmt.audio.i_bitspersample = 64;
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p_sys->fmt.audio.i_blockalign = 8 * p_sys->fmt.audio.i_channels;
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i_cat = AU_CAT_PCM;
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break;
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case AU_ADPCM_G721: /* 4-bit CCITT g.721 ADPCM */
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p_sys->fmt.i_codec = VLC_FOURCC( 'a', 'u', 0, AU_ADPCM_G721 );
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p_sys->fmt.audio.i_bitspersample = 0;
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p_sys->fmt.audio.i_blockalign = 0 * p_sys->fmt.audio.i_channels;
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i_cat = AU_CAT_ADPCM;
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break;
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case AU_ADPCM_G722: /* CCITT g.722 ADPCM */
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p_sys->fmt.i_codec = VLC_FOURCC( 'a', 'u', 0, AU_ADPCM_G722 );
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p_sys->fmt.audio.i_bitspersample = 0;
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p_sys->fmt.audio.i_blockalign = 0 * p_sys->fmt.audio.i_channels;
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i_cat = AU_CAT_ADPCM;
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break;
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case AU_ADPCM_G723_3: /* CCITT g.723 3-bit ADPCM */
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p_sys->fmt.i_codec = VLC_FOURCC( 'a', 'u', 0, AU_ADPCM_G723_3 );
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p_sys->fmt.audio.i_bitspersample = 0;
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p_sys->fmt.audio.i_blockalign = 0 * p_sys->fmt.audio.i_channels;
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i_cat = AU_CAT_ADPCM;
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break;
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case AU_ADPCM_G723_5: /* CCITT g.723 5-bit ADPCM */
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p_sys->fmt.i_codec = VLC_FOURCC( 'a', 'u', 0, AU_ADPCM_G723_5 );
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p_sys->fmt.audio.i_bitspersample = 0;
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p_sys->fmt.audio.i_blockalign = 0 * p_sys->fmt.audio.i_channels;
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i_cat = AU_CAT_ADPCM;
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break;
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default:
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msg_Warn( p_demux, "unknow encoding=0x%x", GetDWBE( &hdr[8] ) );
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p_sys->fmt.audio.i_bitspersample = 0;
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p_sys->fmt.audio.i_blockalign = 0;
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i_cat = AU_CAT_UNKNOWN;
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break;
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}
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p_sys->fmt.i_bitrate = p_sys->fmt.audio.i_rate *
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p_sys->fmt.audio.i_channels *
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p_sys->fmt.audio.i_bitspersample;
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if( i_cat == AU_CAT_UNKNOWN || i_cat == AU_CAT_ADPCM )
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{
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p_sys->i_frame_size = 0;
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p_sys->i_frame_length = 0;
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msg_Err( p_demux, "unsupported codec/type (Please report it)" );
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free( p_sys );
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return VLC_EGENERIC;
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}
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/* add the es */
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p_sys->es = es_out_Add( p_demux->out, &p_sys->fmt );
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/* calculate 50ms frame size/time */
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i_samples = __MAX( p_sys->fmt.audio.i_rate / 20, 1 );
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p_sys->i_frame_size = i_samples * p_sys->fmt.audio.i_channels *
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( (p_sys->fmt.audio.i_bitspersample + 7) / 8 );
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if( p_sys->fmt.audio.i_blockalign > 0 )
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{
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if( ( i_modulo = p_sys->i_frame_size % p_sys->fmt.audio.i_blockalign ) != 0 )
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{
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p_sys->i_frame_size += p_sys->fmt.audio.i_blockalign - i_modulo;
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}
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}
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p_sys->i_frame_length = (mtime_t)1000000 *
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(mtime_t)i_samples /
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(mtime_t)p_sys->fmt.audio.i_rate;
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return VLC_SUCCESS;
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}
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/*****************************************************************************
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* Demux: read packet and send them to decoders
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*****************************************************************************
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* Returns -1 in case of error, 0 in case of EOF, 1 otherwise
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*****************************************************************************/
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static int Demux( demux_t *p_demux )
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{
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demux_sys_t *p_sys = p_demux->p_sys;
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block_t *p_block;
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/* set PCR */
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es_out_Control( p_demux->out, ES_OUT_SET_PCR, p_sys->i_time );
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if( ( p_block = stream_Block( p_demux->s, p_sys->i_frame_size ) ) == NULL )
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{
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msg_Warn( p_demux, "cannot read data" );
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return 0;
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}
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p_block->i_dts =
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p_block->i_pts = p_sys->i_time;
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es_out_Send( p_demux->out, p_sys->es, p_block );
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p_sys->i_time += p_sys->i_frame_length;
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return 1;
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}
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/*****************************************************************************
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* Close: frees unused data
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*****************************************************************************/
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static void Close( vlc_object_t * p_this )
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{
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demux_t *p_demux = (demux_t*)p_this;
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demux_sys_t *p_sys = p_demux->p_sys;
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free( p_sys );
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}
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/*****************************************************************************
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* Control:
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*****************************************************************************/
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static int Control( demux_t *p_demux, int i_query, va_list args )
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{
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demux_sys_t *p_sys = p_demux->p_sys;
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return demux2_vaControlHelper( p_demux->s, p_sys->i_header_size, -1,
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p_sys->fmt.i_bitrate, p_sys->fmt.audio.i_blockalign,
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i_query, args );
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}
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